US2024402440A1PendingUtilityA1
Optical receptacle, optical module and transmission apparatus
Est. expiryMay 30, 2043(~16.8 yrs left)· nominal 20-yr term from priority
Inventors:Tomohiro Saito
G02B 6/4214G02B 6/4206
62
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Claims
Abstract
An optical receptacle includes an incidence surface and an emission surface. R1/|R2|>1.5 (Equation 1) and T/(R1+R2)>1.5 (Equation 2) are satisfied, where R1 is a curvature radius of a center of the incidence surface, R2 is a curvature radius of a center of the emission surface, and T is a light path length between the center of the incidence surface and the center of the emission surface.
Claims
exact text as granted — not AI-modified1 . An optical receptacle made of resin and configured to optically couple a light-emitting element and an end surface of an optical transmission member when the optical receptacle is disposed between the light-emitting element and the optical transmission member, the optical receptacle comprising:
an incidence surface that is a convex surface configured to allow incidence of light emitted from the light-emitting element; an emission surface that is a convex surface configured to emit, toward the end surface of the optical transmission member, light incident on the incidence surface, wherein the following Equation 1 and Equation 2 are satisfied:
R
1
/
❘
"\[LeftBracketingBar]"
R
2
❘
"\[RightBracketingBar]"
>
1.5
,
and
(
Equation
1
)
T
/
(
R
1
+
R
2
)
>
1.5
(
Equation
2
)
where R1 is a curvature radius of a center of the incidence surface, R2 is a curvature radius of a center of the emission surface, and T is a light path length between the center of the incidence surface and the center of the emission surface.
2 . The optical receptacle according to claim 1 , wherein a focal length of the optical receptacle is a negative number.
3 . An optical module comprising:
a light-emitting element; and the optical receptacle according to claim 1 where light emitted from the light-emitting element enters, wherein the following Equation 3 is satisfied
E
1
/
E
2
>
1.2
(
Equation
3
)
where E1 is a diameter on the incidence surface of light emitted from the light-emitting element that impinges on the incidence surface, and E2 is a diameter on the emission surface of light emitted from the light-emitting element that is emitted from the emission surface.
4 . The optical module according to claim 3 , wherein in a cross section including an optical axis of the light-emitting element, a center of the incidence surface and a center of the emission surface, light emitted from a center of a light-emitting surface of the light-emitting element includes light that intersects the optical axis in a region between the incidence surface and the emission surface.
5 . The optical module according to claim 3 , further comprising a reflection surface configured to reflect, toward the emission surface, light having entered from the incidence surface.
6 . A transmission apparatus comprising:
the optical module according to claim 3 ; and an optical transmission member where light emitted from the optical receptacle impinges, wherein the following Equation 4 is satisfied,
D
1
/
D
2
>
5
(
Equation
4
)
where D1 is a distance between a center of a light-emitting surface of the light-emitting element and a center of the incidence surface, and D2 is a distance between a center of the emission surface and the end surface of the optical transmission member.Join the waitlist — get patent alerts
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